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<?php $ary1 = array( array( 'sn' => '123', 'name' => 'whatever', ), array( 'sn' => '234', 'name' => 'whatever', ), ); $ary2 = array( array( 'sn' => '123', 'gender' => 'male', ), array( 'sn' => '234', 'gender' => 'female', ), ); $res = []; foreach (array_merge($ary1, $ary2) as $a) { $res[$a['sn']] = (count($res[$a['sn']])) ? array_merge($res[$a['sn']], $a) : $a; } var_dump($res);
Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
Warning: Undefined array key 123 in /in/76BuQ on line 27 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/76BuQ:27 Stack trace: #0 {main} thrown in /in/76BuQ on line 27
Process exited with code 255.
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Warning: Undefined array key 123 in /in/76BuQ on line 27 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/76BuQ:27 Stack trace: #0 {main} thrown in /in/76BuQ on line 27
Process exited with code 255.
Output for 8.0.0 - 8.0.9
Warning: Undefined array key 123 in /in/76BuQ on line 27 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, null given in /in/76BuQ:27 Stack trace: #0 {main} thrown in /in/76BuQ on line 27
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined offset: 123 in /in/76BuQ on line 27 Warning: count(): Parameter must be an array or an object that implements Countable in /in/76BuQ on line 27 Notice: Undefined offset: 234 in /in/76BuQ on line 27 Warning: count(): Parameter must be an array or an object that implements Countable in /in/76BuQ on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }
Output for 7.3.32 - 7.3.33
Warning: count(): Parameter must be an array or an object that implements Countable in /in/76BuQ on line 27 Warning: count(): Parameter must be an array or an object that implements Countable in /in/76BuQ on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33
Notice: Undefined offset: 123 in /in/76BuQ on line 27 Notice: Undefined offset: 234 in /in/76BuQ on line 27 array(2) { [123]=> array(3) { ["sn"]=> string(3) "123" ["name"]=> string(8) "whatever" ["gender"]=> string(4) "male" } [234]=> array(3) { ["sn"]=> string(3) "234" ["name"]=> string(8) "whatever" ["gender"]=> string(6) "female" } }

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